CH642514GA3 - - Google Patents

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Publication number
CH642514GA3
CH642514GA3 CH792878A CH792878A CH642514GA3 CH 642514G A3 CH642514G A3 CH 642514GA3 CH 792878 A CH792878 A CH 792878A CH 792878 A CH792878 A CH 792878A CH 642514G A3 CH642514G A3 CH 642514GA3
Authority
CH
Switzerland
Prior art keywords
signal
circuit
timekeeping
low frequency
frequency
Prior art date
Application number
CH792878A
Other languages
English (en)
French (fr)
Other versions
CH642514B (fr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Publication of CH642514B publication Critical patent/CH642514B/fr
Application filed filed Critical
Publication of CH642514GA3 publication Critical patent/CH642514GA3/fr

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Telephone Function (AREA)
CH792878A 1977-07-21 1978-07-21 Piece d'horlogerie electronique miniature, notamment montre-bracelet. CH642514B (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8772477A JPS5422865A (en) 1977-07-21 1977-07-21 Miniature electronic watch

Publications (2)

Publication Number Publication Date
CH642514B CH642514B (fr)
CH642514GA3 true CH642514GA3 (en]) 1984-04-30

Family

ID=13922850

Family Applications (1)

Application Number Title Priority Date Filing Date
CH792878A CH642514B (fr) 1977-07-21 1978-07-21 Piece d'horlogerie electronique miniature, notamment montre-bracelet.

Country Status (3)

Country Link
US (1) US4407019A (en])
JP (1) JPS5422865A (en])
CH (1) CH642514B (en])

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913972A (ja) * 1982-07-15 1984-01-24 Seiko Epson Corp 指針表示電子時計
US4634288A (en) * 1985-04-17 1987-01-06 Clemar Manufacturing Corporation Auxiliary timing source for ac-powered electronic clocks
DE69312697T2 (de) * 1993-01-08 1997-12-04 Citizen Watch Co Ltd Datenübertragungsempfangsystem für elektronische Uhr
KR100498839B1 (ko) * 2002-11-26 2005-07-04 삼성전자주식회사 아날로그 시계 내장형 단말기의 아날로그 시계 시각 조정방법 및 장치
US20090257321A1 (en) * 2008-04-14 2009-10-15 Gary Lee Scott Dithering control of oscillator frequency to reduce cumulative timing error in a clock
CN110928172B (zh) * 2019-12-20 2024-07-19 湖南北斗天汇信息科技有限公司 一种卫星手表晶振精度检测方法和守时方法及卫星手表

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777471A (en) * 1971-08-27 1973-12-11 Bulova Watch Co Inc Presettable frequency divider for electronic timepiece
CH554015A (en]) * 1971-10-15 1974-09-13
GB1450072A (en) * 1972-10-02 1976-09-22 Citizen Watch Co Ltd Electronic timepiece
JPS587190B2 (ja) * 1973-12-05 1983-02-08 セイコーエプソン株式会社 スイシヨウドケイ
JPH0310916B2 (en]) * 1974-10-31 1991-02-14 Citizen Watch Co Ltd
JPS5188257A (en) * 1975-01-31 1976-08-02 Denshidokeino kankyuchoseisochi
JPS525566A (en) * 1975-07-02 1977-01-17 Citizen Watch Co Ltd Electric clock
JPS6024433B2 (ja) * 1975-08-01 1985-06-12 シチズン時計株式会社 時計用回路
CH599609B5 (en]) * 1976-04-23 1978-05-31 Ebauches Sa
JPS5312255A (en) * 1976-07-21 1978-02-03 Seiko Epson Corp Electronic clock
US4290130A (en) * 1979-12-21 1981-09-15 Timex Corporation Digital frequency trimmed electronic timepiece

Also Published As

Publication number Publication date
JPS5422865A (en) 1979-02-21
US4407019A (en) 1983-09-27
CH642514B (fr)

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